linux-kernel - [RFC PATCH 13/20] MIPS/xlr/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X

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Date:	Tue, 12 Aug 2014 15:26:06 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	<linux-kernel@...r.kernel.org>, Xinwei Hu <huxinwei@...wei.com>,
	Wuyun <wuyun.wu@...wei.com>, <linux-pci@...r.kernel.org>,
	Marc Zyngier <marc.zyngier@....com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	<arnab.basu@...escale.com>, <x86@...nel.org>,
	"Arnd Bergmann" <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	<xen-devel@...ts.xenproject.org>, Joerg Roedel <joro@...tes.org>,
	<iommu@...ts.linux-foundation.org>, <linux-mips@...ux-mips.org>,
	"Benjamin Herrenschmidt" <benh@...nel.crashing.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-s390@...r.kernel.org>,
	Sebastian Ott <sebott@...ux.vnet.ibm.com>,
	"Tony Luck" <tony.luck@...el.com>, <linux-ia64@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	<sparclinux@...r.kernel.org>, Chris Metcalf <cmetcalf@...era.com>,
	Yijing Wang <wangyijing@...wei.com>
Subject: [RFC PATCH 13/20] MIPS/xlr/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X

Introduce a new struct msi_chip xlr_msi_chip instead of weak arch
functions to configure MSI/MSI-X.

Signed-off-by: Yijing Wang <wangyijing@...wei.com>
---
 arch/mips/pci/pci-xlr.c |   19 +++++++++++++++----
 1 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/arch/mips/pci/pci-xlr.c b/arch/mips/pci/pci-xlr.c
index 0dde803..6eef164 100644
--- a/arch/mips/pci/pci-xlr.c
+++ b/arch/mips/pci/pci-xlr.c
@@ -214,11 +214,11 @@ static int get_irq_vector(const struct pci_dev *dev)
 }
 
 #ifdef CONFIG_PCI_MSI
-void arch_teardown_msi_irq(unsigned int irq)
+void xlr_teardown_msi_irq(unsigned int irq)
 {
 }
 
-int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
+int xlr_setup_msi_irq(struct device *dev, struct msi_desc *desc)
 {
 	struct msi_msg msg;
 	struct pci_dev *lnk;
@@ -233,7 +233,7 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 	 * Enable MSI on the XLS PCIe controller bridge which was disabled
 	 * at enumeration, the bridge MSI capability is at 0x50
 	 */
-	lnk = xls_get_pcie_link(dev);
+	lnk = xls_get_pcie_link(to_pci_dev(dev));
 	if (lnk == NULL)
 		return 1;
 
@@ -243,7 +243,7 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 		pci_write_config_word(lnk, 0x50 + PCI_MSI_FLAGS, val);
 	}
 
-	irq = get_irq_vector(dev);
+	irq = get_irq_vector(to_pci_dev(dev));
 	if (irq <= 0)
 		return 1;
 
@@ -263,6 +263,17 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 	write_msi_msg(irq, &msg);
 	return 0;
 }
+
+struct msi_chip xlr_msi_chip = {
+	.setup_irq = xlr_setup_msi_irq,
+	.teardown_irq = xlr_teardown_msi_irq,
+};
+
+struct msi_chip *arch_get_match_msi_chip(struct device *dev)
+{
+	return &xlr_msi_chip;
+}
+
 #endif
 
 /* Extra ACK needed for XLR on chip PCI controller */
-- 
1.7.1

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